Abstract: Provided is an ink jet recording method including: discharging first ultraviolet curable ink of a radical polymerization reaction type which contains a radical photopolymerization initiator and a radical polymerization compound and in which transmittance at a wavelength of 395 nm is equal to or less than 1 %, onto a recording medium; and curing the first ultraviolet curable ink which is landed on the recording medium by irradiating the ink with ultraviolet light, in which a light source which initially emits the ultraviolet light in the curing of the ink is an ultraviolet light emitting diode in which peak intensity of the irradiated ultraviolet light is equal to or more than 800 mW/cm2.

Abstract: An ink jet recording method includes ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium, and curing the ultraviolet-ray curable ink attached to the recording medium, wherein, in the ejecting of the ultraviolet-ray curable ink, the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink becomes 28° C. to 40° C., and a viscosity of the ultraviolet-ray curable ink at the temperature is 15 mPa·s or less.

Abstract: An ultraviolet curing ink jet ink composition includes a trifunctional or tetrafunctional (meth)acrylate having a pentaerythritol skeleton; and inorganic metal-based fine particles as a color material, in which the viscosity is 8 to 22 mPa·s at 20° C.

Abstract: Provided is an ink jet recording method including: discharging first ultraviolet curable ink of a radical polymerization reaction type which contains a radical photopolymerization initiator and a radical polymerization compound and in which transmittance at a wavelength of 395 nm is equal to or less than 1%, onto a recording medium; and curing the first ultraviolet curable ink which is landed on the recording medium by irradiating the ink with ultraviolet light, in which a light source which initially emits the ultraviolet light in the curing of the ink is an ultraviolet light emitting diode in which peak intensity of the irradiated ultraviolet light is equal to or more than 800 mW/cm2.

Abstract: An ink jet recorder includes a support unit configured to support a recording medium, and a mobile unit including a plurality of containers containing inks of identical composition and a head configured to eject the ink supplied from any one of the plurality of containers. The ink jet recorder is configured to record an image on the recording medium in such a manner that the head performs main scanning by ejecting the ink while changing positions in a first direction, and the mobile unit performs sub-scanning by moving in a second direction intersecting with the first direction.

Abstract: An ink jet recording method includes delivering a non-aqueous light-curable ink composition stored in an ink container from the ink container to a head via an ink delivery path and discharging the ink composition from the head toward a recording medium. The non-aqueous light-curable ink composition contains a radically-polymerizable compound and has a surface tension of 25 mN/m or less. The non-aqueous light-curable ink composition stored in the ink container has a dissolved air content of 7 ppm or more. The non-aqueous light-curable ink composition has a dissolved air content of 30 ppm or less at delivery from the ink delivery path to the head.

Abstract: The printing device including: a first setting unit configured to set printing mode of a main image and to set either front-surface printing mode for printing a background image on the medium and then printing the main image on the background image or rear-surface printing mode for printing the main image on the medium and then printing the background image on the main image; and a second setting unit configured to set a printing mode of an additional image printed in association with the printing of the main image and to set either front-surface printing mode for printing a background image for the additional image on the medium and then printing the additional image on the background image for the additional image or rear-surface printing mode for printing the additional image on the medium and then printing the background image for the additional image on the additional image.

Abstract: An ink jet recording method includes ejecting an ultraviolet-ray curable ink of which a viscosity at 28° C. is 8 mPa·s or more from a head to a recording medium, and curing the ultraviolet-ray curable ink attached to the recording medium, wherein, in the ejecting of the ultraviolet-ray curable ink, the ultraviolet-ray curable ink is heated such that a temperature of the ejected ultraviolet-ray curable ink becomes 28° C. to 40° C., and a viscosity of the ultraviolet-ray curable ink at the temperature is 15 mPa·s or less.

Abstract: An ink jet recorder includes a support unit configured to support a recording medium, and a mobile unit including a plurality of containers containing inks of identical composition and a head configured to eject the ink supplied from any one of the plurality of containers. The ink jet recorder is configured to record an image on the recording medium in such a manner that the head performs main scanning by ejecting the ink while changing positions in a first direction, and the mobile unit performs sub-scanning by moving in a second direction intersecting with the first direction.

Abstract: An apparatus for printing an image on a transparent medium based on a selected mode, the apparatus includes: a head that ejects ink droplets from nozzles, wherein when a first mode is selected, the head prints a first image on the transparent medium, prints a background image on the first image, and prints a second image which is different from the first image on the background image, and wherein when a second mode is selected, the head prints a second image on the transparent medium, prints a background image on the second image, and prints a first image on the background image.

Abstract: An ink jet recorder includes a support unit configured to support a recording medium, and a mobile unit including a plurality of containers containing inks of identical composition and a head configured to eject the ink supplied from any one of the plurality of containers. The ink jet recorder is configured to record an image on the recording medium in such a manner that the head performs main scanning by ejecting the ink while changing positions in a first direction, and the mobile unit performs sub-scanning by moving in a second direction intersecting with the first direction.

Abstract: There is provided a maintenance liquid, which is used in maintenance of a device equipped with a discharge head for discharging an ultraviolet ray curable-type composition containing the acyl phosphine oxide-based photopolymerization initiator toward an attachment object, including a polymerizable compound in which a saturation solubility of an acyl phosphine oxide-based photopolymerization initiator at 20° C. is equal to or greater than 5.0% by mass.

Abstract: A printing apparatus which prints an image on a transparent medium using a head which discharges ink droplets from nozzles. Two pieces of image data are prepared, one piece of image data is selected from the two pieces of image data to set the selected image data to one of a first image and a second image, and the other piece of image data is set to the other of the first image and the second image. The image data set to the first image is subjected to a processing to be mirror image data. The head prints the mirror image of the first image on the medium, prints a background image on the mirror image of the first image, and prints a real image of the second image on the background image.

Abstract: An image recording apparatus causes the repeated alternating execution of an ejection operation, in which light-curable ink is ejected from a head while the head and a light irradiation unit are moved in a predetermined direction by a movement mechanism, and a transport operation, in which a medium is moved relative to the head and the light irradiation unit in a direction that is orthogonal to the predetermined direction; and reduces the irradiation intensity of the light irradiation unit during acceleration/deceleration periods, when the movement mechanism moves the head and the light irradiation unit at a velocity that is lower than a predetermined velocity, to a lower irradiation intensity than the irradiation intensity of the light irradiation unit during a constant velocity period, when the movement mechanism moves the head and the light irradiation unit at the predetermined velocity.

Abstract: A printing device that forms a background by a first ink and images on the background by a second ink includes a head having first and second nozzle lines that eject, respectively, the first and second inks. The inks are ejected as the head moves, with respect to a medium, in a main scanning direction intersecting the first and second nozzle lines. A transport section transports the medium in a sub-scanning direction along the first and second nozzle lines. In an ejecting operation, the first and second inks are ejected in the relative movement in the main scanning direction and the relative transportation in the sub-scanning direction is performed. In the sub-scanning direction, first and second nozzle line used areas are set where the first and second inks, respectively, are ejected from the first and second nozzle lines. A nozzle unused area is defined therebetween.

Abstract: The printing device including: a first setting unit configured to set printing mode of a main image and to set either front-surface printing mode for printing a background image on the medium and then printing the main image on the background image or rear-surface printing mode for printing the main image on the medium and then printing the background image on the main image; and a second setting unit configured to set a printing mode of an additional image printed in association with the printing of the main image and to set either front-surface printing mode for printing a background image for the additional image on the medium and then printing the additional image on the background image for the additional image or rear-surface printing mode for printing the additional image on the medium and then printing the background image for the additional image on the additional image.

Abstract: Provided is a printing device including: nozzles which discharge a first aqueous ink for printing a main image; nozzles which discharge a second aqueous ink for printing a background image; and a control unit which controls printing of an image on a medium having an aqueous ink absorption property based on one selected from a first mode for printing the main image using the first aqueous ink and a second mode for superposing and printing the main image using the first aqueous ink and the background image using the second aqueous ink, wherein the amount of first aqueous ink dischargeable per unit area of the medium when the main image is printed on the medium in the second mode is less than that when the main image is printed on the medium in the first mode.

Abstract: An apparatus for printing an image on a transparent medium based on a selected mode, the apparatus includes: a head that ejects ink droplets from nozzles, wherein when a first mode is selected, the head prints a first image on the transparent medium, prints a background image on the first image, and prints a second image which is different from the first image on the background image, and wherein when a second mode is selected, the head prints a second image on the transparent medium, prints a background image on the second image, and prints a first image on the background image.

Abstract: An image forming apparatus provided with a first mode in which one nozzle row group is positioned so as to be shifted to the downstream side of the medium transport direction with respect to another nozzle row group, ink forming a main image is filled into the first nozzle row in the one nozzle row group, ink forming a background image is filled into the second nozzle row in the other nozzle row group, and the one nozzle row group and the other nozzle row group are used to form the background image before the main image, and a second mode, in which ink forming a background image is filled into the first nozzle row, ink forming the main image is filled into the second nozzle row, and the one nozzle row group and the other nozzle row group are used to form the main image before the background image.

Abstract: The printing device including: a first setting unit configured to set printing mode of a main image and to set either front-surface printing mode for printing a background image on the medium and then printing the main image on the background image or rear-surface printing mode for printing the main image on the medium and then printing the background image on the main image; and a second setting unit configured to set a printing mode of an additional image printed in association with the printing of the main image and to set either front-surface printing mode for printing a background image for the additional image on the medium and then printing the additional image on the background image for the additional image or rear-surface printing mode for printing the additional image on the medium and then printing the background image for the additional image on the additional image.